[issue46386] Improve `test_typing::test_immutability_by_copy_and_pickle`

[Dong-hee Na]

Dong-hee Na <donghee.na at python.org> added the comment:

Thank you @sobolevn !

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stage: patch review -> resolved
status: open -> closed

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue46386>
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